Robtex

Up: 197.39.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 197.39.144.0/22
Down right: 197.39.148.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
197.39.144.243	PTR	host-197.39.144.243.tedata.net
197.39.146.13	PTR	host-197.39.146.13.tedata.net
197.39.148.245	PTR	host-197.39.148.245.tedata.net
197.39.148.245	A	online.dnset.com
197.39.151.122	PTR	host-197.39.151.122.tedata.net
197.39.151.122	A	ns3.frowcmx.us
197.39.151.122	A	ns2.frowcmx.us